The atoms of a certain element each contain 19 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity? A. The element is fluorine, and it is highly reactive.
B. The element is potassium, and it is very stable.
C. The element is fluorine, and it is very stable.
D. The element is potassium, and it is highly reactive.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

how important do you think an instrument is to the musician who plays it?